FINAL SITE INSPECTION REPORT

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771772773774775776777778779conclusions and recommendations. All stakeholders participating in the meeting concurred withthe SI conclusions and recommendations. However, ODEQ does not concur with therecommendation of NDAI relative to MC at Range Complex No. 1. ODEQ indicated that thereare several potential non-DoD related activity sources for perchlorate in groundwater in theLower Umatilla Basin and until the other source(s) for perchlorate are determined they cannotagree to a determination of NDAI relative to MC at Range Complex No. 1. ODEQ did agreewith the findings in the SI Report for a NDAI recommendation with respect to MC for TargetNo. 1, Target No. 2, and Carty Reservoir Bomb Target. The meeting agenda and minutes areprovided in Appendix B.Boardman AFR Final SI Report.doc 3-9 Contract No. W912DY-04-D-0010 Delivery Order No. 003September 2007
7804.0 Target No. 17817827837847857867877887897907917927937947957967977987998008018028038048058068078088098108114.1 History and Land UseThe Target No. 1 AOC consists of a single target configured with concentric circles with radii of100, 200, and 300 ft, which was standard range layout for the time of use. The target name isconsistent with the ASR Supplement. The southern one-third of the AOC overlaps with CartyReservoir Target AOC. The location of the AOC is shown on Figures 3-1 and 4-1.The Target No. 1 AOC is located on BAIC, Inc. and PGE property adjacent to Carty Reservoir.Approximately 40 percent of the target drop area safety zone is flooded by Carty Reservoir. Thesafety zone is an area surrounding a target where the potential for bomb impacts exists.The terrain is flat with a gradual slope toward the shoreline of Carty Reservoir. The areanortheast of the safety zone has been extensively reworked during power plant construction andthe building of an earthen dam for Carty Reservoir. The property to the north and west of thetarget is now used for irrigated farming. Portions of land near Carty Reservoir are uncultivatedand near the reservoir shore, brush and trees have grown.One groundwater monitoring well installed by the PGE Power Generating Station is locatedwithin the AOC. An industrial water supply well is located approximately 650 ft northeast of theouter boundary of the AOC. Carty Reservoir is the nearest surface water body to the AOC.Sixmile Canyon Creek flows through the northeast corner of the target. The source of water forCarty Reservoir is via pump from the Columbia River. The reservoir water is used for cooling atthe PGE Power Generating Station. Future land use is expected to remain the same.The target was used between 1948 and 1960 and is thought to be a replacement target for theCarty Reservoir Target, which was used between 1942 and 1945. It is unclear of the extent ofuse of this target. During the ASR field visit, no MEC or MD were identified within the targetfootprint or safety zone. The contractor that conducted the INPR for the USACE identifiedseveral small items and according to the ASR, the description matched that of a 31-lb practicebomb. This MD is thought to be from a MK-76 25-lb practice bomb. During the SI fieldactivities MD was identified within the footprint of Target No. 1.4.2 Previous InvestigationsOther than the ASR and INPR, no previous investigations have been completed at Target No. 1.The PA/SI completed by Weston for the EPA in 2004 did not investigate this AOC. However,the PA/SI collected a surface water sample from Carty Reservoir. The analytical results fromthis sample are discussed in Section 4.4.2.Boardman AFR Final SI Report.doc 4-1 Contract No. W912DY-04-D-0010 Delivery Order No. 003September 2007
Page 1 and 2: Omaha DistrictFINAL SITE INSPECTION
Page 3 and 4: Table of Contents__________________
Page 5 and 6: Table of Contents(Cont.) __________
Page 7 and 8: List of Figures ___________________
Page 9 and 10: List of Appendices_________________
Page 11 and 12: List of Acronyms (Cont.) __________
Page 13 and 14: Glossary of Terms _________________
Page 15 and 16: Risk Assessment Code (RAC) - An int
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Page 51 and 52: 10846.0 Carty Reservoir Bomb Target
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Page 77 and 78: 18921893not chemical contamination
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